Altera Low Latency 40-Gbps Ethernet MAC and PHY MegaCore Function - Manual (Page 137)

Addr Name Bit Description HW Reset
Value
Access
the TX MAC to pause outgoing traffic on the
TX Ethernet link. If you implement priority-
based flow control, the TX MAC pauses
outgoing traffic from the indicated priority
queue to the TX Ethernet link in response to
this notification. If you implement standard
flow control, the TX MAC pauses outgoing
traffic on the TX Ethernet link in response to
this notification only if bit [0] of the
TX_XOF_
EN
register has the value of 1.
0x706 RX_PAUSE_
FWD
[0]
cfg_fwd_ctrl
bit. When this bit has the
value of 1, the RX MAC forwards matching
pause frames to the RX client interface.
When this bit has the value of 0, the RX MAC
does not forward matching pause frames to
the RX client interface. In both cases, the RX
MAC forwards non-matching pause frames
to the RX client interface.
1'b0 RW
0x707
RX_PAUSE_
DADDRL
[31:0]
RX_PAUSE_DADDRL
contains the 32 least
significant bits of the destination address for
pause frame matching.
RX_PAUSE_DADDRH
contains the 16 most
significant bits of the destination address for
pause frame matching.
When pause frame processing is turned on, if
{RX_PAUSE_DADDRH[15:0],RX_PAUSE_
DADDRL[31:0]}
matches the incoming pause
frame destination address, the IP core
processes the pause frame. if there is no
match, the IP core does not process the pause
frame.
{RX_PAUSE_DADDRH[15:0],RX_PAUSE_
DADDRL[31:0]}
can be a broadcast,
muilticast, or unicast address.
0xC200_0001 RW
0x708
RX_PAUSE_
DADDRH
[15:0] 0x0180 RW
Related Information
Pause Control and Generation Interface on page 3-30
Describes the pause signals available in the Low Latency 40-100GbE IP core.
TX Statistics Registers
The TX statistics registers count TX Ethernet traffic and errors. The 64-bit statistics registers are designed
to roll over, to ensure timing closure on the FPGA. However, these registers should never roll over if the
3-92 TX Statistics Registers
UG-01172
2015.05.04
Altera Corporation Functional Description
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